Drawbar



N. C. BEMENT.

DRAWBAR.

APPLICATION men NOV-15,!920.

1,396,500. Patented Nov. 8, 1921.

' 4M @QWM $41M v NAHUM C. IBEMENT, OF ROCKFORD, ILLINOIS.

DRAWBAB.

Specification of Letters Patent.

Patented Nov. 8, 1921.

Application filed November 15, 1920. Serial No. 424,046.

To all whom it may concern:

Be it known that I. NAHUM C. ldmmn'r, a citizen of the United States.residing at Rockford, Winnebago county, Illinois, have invented certainnew and useful Improvements in Drawbars, of which the following, takenin connection with the drawings, is a description.

My invention-has for its object the pro duction of a draw bar designedmore particularly to be used in connection with vehicles, such as farmtractors.

One of the objects of my invention 1s to provide a draw bar which shallbe automatically adjustable to the different heights or levels of themachine or vehicle when traveling over an uneven surface.

Another object of my invention is to provide a draw bar which shallabsorb the shock when the machine encounters an obstruction and preventas far as possible the transmission of the shock to the engine of themachine.

This I accomplish by the provision of springs whereby the horse powerdraw bar pull will be on the springs.

Another object of my invention is to produce a flexible draw bar whichwill automatically accomplish the above object, one which is always surein its action and one which is positioned with respect to its action inconnection with the frame of the vehicle to equalize the strain and pullof the propelling force, no matter whether the machine is traveling overa rough or smooth surface.

A further object of my invention is to provide an end spring draw barwhich will eliminate the dead pull on starting the machine.

It is also an object of my invention to provide a draw bar which willgreatly increase the serviceabilty of the vehicle by relieving it of agreat portion of the tearing and straining effect customary withmachines of this class, thereby greatly enhancing its usefulness.

A further object of my invention is to provide a draw bar so constructedthat the two ends thereof are movably secured to the sides of thevehicle frame forward of the traction wheels. By this means the strainof draw bar pull is at all times upon the two side members of thevehicle frame, thereby securing greater traction than is possible withthe draw bar having but a. single point of attachment and that at thecenter of the rear of the machine as has heretofore been the case.

I In the accompanying drawings I have illustrated what I now considerthe preferred form of an embodiment of my construction which consists inthe combination of an arrangement of parts hereinafter more fullydescribed and claimed, it being understood of course that certainchanges may be made with respect to size, proportion and minor detailswithout departing from the spirit of or sacrificing any of theadvantages of my invention.

In these drawings,

Figure 1 is a side elevation of a vehicle frame illustrating theposition of attachment of a draw bar with respect to said frame,

Fig. 2 is an enlarged side elevation of one side of my draw bar and Fig.3 is a top plan view of the same.

Referring to the drawings 4, 4, illustrates the side channels of atractor frame to which this mechanism is attached. Secured near the rearends of said channels are opposite ends of a supporting frame member 5which depends therefrom approximately 12 to inches. and extendstransversely of the vehicle frame, between which frame member and thevehicle body my draw bar operates.

6 and 7 are parallel bars, each having one end thereof, 8 and 9 bent atapproximately right angles thereto, and attached at the ends by bolts.10, or otherwise to the side channels 4, 4, of the vehicle.

The point of attachment of these bars is found most expedient inpractice to beat the rear of a line extending transversely of the centerof the vehicle body as shown more clear y in Fig. 1.

The outwardly extending free ends of the bars 6 and 7, normally restupon the transversely extending supporting frame 5.

1 represents the end frame of my draw bar, which is positionedtransversely of the channels 4, 4, the ends 12, 12, thereof being bentat an angle thereto, extending parallel to the side members 6 and 7 andinclosing the ends 18 of said bars 6 and 7, to which they are securelyattached by rivets or other- Wise, aS shown. The frame formed by theside members 6 and 7 and the end member 11 may if desired, be formed ofone continuous piece, but I have found it more expedient to construct itof the three pieces shown.

The draw bar frame as completed is U-- shaped, the ends of the framebeing bent at an angle as shown.

Extending through the end frame 11 at either side of the center thereofare the draft beams 14:, 14 which are ositioned above the supportingframe 5. upported upon'these beams 14:, inside of the frame formed bythe end member 11 and the side members 6 and 7, are the draw bar springs15, 15, one end of which seats against the frame member 11 and theopposite ends thereof against a plate 16 held on said beam by the bolts17, 17.

18, 18 are clevises which are attached by bolts to the outer ends of thebeams 14, 14, and which are by the links 19, 19, attached to clevises20, 20, which in turn have engagement with the whiflletree 21. Thewhiflletree 21 is provided with a plurality of. perforations 22, towhich may be adjustably secured any farm implement such as a plow,harrow or the like.

Any pull on the draw bar, which in this instance is formed by the beams14, supporting the springs 15 which are maintained within the frameformed by the side members 6 and 7 and the end frame 11, is immediatelytransmitted through the beams 14, the plate 16 to the springs 15 andagainst the end 11 of the draw bar frame, and through said frame to theconnections 10 with the channels 4:, 4, of the vehicle frame. The sidemembers 6 and 7 which are movably attached to the channels 1, 4, willaccommodate themselves to any roughness or unevenness by a verticalmovement of the end frame between the vehicle frame and the transverselyextending supportingmember 5, a distance of 12 inches more or less.

The normal pull on the draw bar attached to the channel l, 4, tends todraw the body of the vehicle downwardly, placing the full weightandforce of the pull upon the wheels of the vehicle which insures a betterand more even of surface.

I claim:

1. A draw bar for vehicles comprising a U shaped frame member, havingthe ends thereof bent upwardly at an angle to the sides, means forupwardly bent ends of the draw bar to the vehicle frame at the sidesthereof between the traction wheels of the vehicle, and draft beams anddraw springs supported on said frame.

2. A draw bar for vehicles comprising a U-shaped frame, the ends of saidframe being bent upwardly at an angle and movably supported from thevehicle frame, draft beams extending through openings in the traction onany kind movably attaching said specification.

end of the aforesaid frame, and draw sprin s supported on said beams.

3. draw bar for vehicles, comprising a U shaped frame member, thereofbent at an angle to the side members, means for movably securing saidend members to the vehicle frame, a frame extending transversely of thevehicle frame and supporting'the free end of the draw bar frame, draftbeams extending through openings in the rear end of the frame member,draft springs supported on said beams and bearing against the inside ofthe U shaped member.

4. A draw bar for motor vehicles, comprising a U shaped frame membermovably attached to the vehicle frame, draft beams extending throughopenings in the rear end of said frame, springs on said beams,saidsprings seating against the inside of the U shaped frame, plates bearingagainst said springs at the opposite end thereof, and attaching membersconnected with the free ends of the aforesaid draft beams inside thedraw bar frame. 7

5. A draw bar for vehicles comprising a U shaped frame member, the endsof said frame member being bent upwardly-at an angle thereto havingmovable engagement with the vehicle body, a transversely exlending framemember supporting the vertically movable free end of the draw bar frame,draft beams extending through openings in the draw bar frame, drawsprings mounted on said beams and bearing against the inside of the drawbar frame, and attaching members connected with the free ends of theaforesaid draft beams outside of the draw bar frame.

6. A draw bar for vehicles, comprising an elongated frame memberextending parallel with the side channels of the vehicle body, means formovably attaching said frames to the side channels of the vehicle frame,a transversely extending frame member attached to the side channels ofthe vehicle frame and supporting the rear end of the draw bar frame,draft beams and draw springs supported thereon in said draw bar frame.

7. Adraw bar for vehicles comprising an elongated U shaped frame memberextending parallel with the side channels of the vehicle body, the endsof said U shaped frame bent at an angle thereto, and movably attached tothe side channels of the vehicle body, draft beams extending throughopenings in the free end of the draw bar and draw springs and end platessupported on' said frames. f

Intestimony whereof I have signed this NAHUM o. BEMENT.

having the ends

